here's how they turned out. the color is a match to space grey, but 3-4 shades darker. they look almost black in the picture, but in the light they are definitely a dark rich colored grey. very happy with how it turned out.

if anyone in the bay area needs to get wheels painted or fixed, I highly recommend Rite Wheel in Walnut Creek. Their shop is a bit of a hole-in-the-wall, but they work on a lot of high-end cars. When I was there, they were re-finishing a set of HRE's for an M3 and painting a set of wheels for a 911 turbo satin black.